I second the steam process. There are a couple of great you tube videos on how to do it, and it is very easy to do, and I have not had any problem with warping, infact I have used it to unwarp a couple of very thing '80s pressings.
Looking for tabletop ideas for VPI 16.5RCM
I would like it on casters and to have enough room to do scrubbing off to the side (not on platter mat).